Improvement in spirit-levels



H. s. SHEPARDSON."

Spirit Lvel.

No. 44,225. i Patented Sept. 13." 1864.

- Wessels, v 1 l Ewen/7;?

UNITED STATES PATENT GEETCE.

H. S. SHEPARDSON, OF SHELBURNE FALLS, MASSACII USFTTS.

IMPROVEMENT IN SPiFIT-LEVELS.'

Specification forming part of Letters Patent No. 44,225, dated September 13, 186:1.

To all whom it may concern:

Be it known that I, H. S. SHEPARDsoN, of Shelburne Falls, in the county of Franklin and State of Massachusetts, have invented a new and Improved Spirit-Level and Bevel; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this speciication, in which- Figure l is a side view ot my invention; Fig. 2, a transverse vertical section ofthe same, taken in the line x x, Fig. 1; Fig. 3, a

`lingitudinal vertical section of' the same,

taken in the line y y, Fig. 2; Fig. 4, a transverse vertical section of the saine, taken in the line z z, Fig. 3.

Similar letters of reference indicate corresponding parts in the several gures.

This invention consists in a novel manner ot' constructing the body or stock of' the implement or device, whereby the same is prevented from warping or springing and at the saine time a light frame obt-a-ined.

The invention also consists in a novel manner ot arranging the adjustable spiritbulb, whereby the same may be adjusted with the greatest facility and retained firmly in the desired position.

The invention further consists in an iinproved arrangement of a cross-wire sight, whereby the same may oc readily adjusted higher or lower, as occasion may teqni e.

To enable those skilled in the art `to fully understand and construct my invention, I will proceed to describe it.

The body or stock of' the implement is composed of meta-l and wood. The metal portion (designated by A; is cast in one piece, and is of rectangular form, and comprises the top a, bottom b, and ends c c of the stock, and said metal portion is cast with flanges d at its inner surface, to receive screws e, by which the wooden sides B are secured to A. The flanges d area trifle inward from the edges of the part A, so that the exterior of the wooden sides B may be iiush with the edges of A, as shown clearly in Fig. 4.

To the upper side, a, of the metal part A of the implement there is secured a spirit bulb, C, a slot, f, being made in a to expose the bulb. (See Fig. 2.) The bulb C is fitted in a metal case, D, which is screwed to the under side of' the top a ot' the part A.

At one side ofthe metal part A there is an upright portion, g, the exterior ot' which is ot' concave form, as shown in Fig. 2, and through the center of g a thumb screw, h, passes, the concave form of f/ preventing the screw Ih from projecting beyond the side ofthe device. At the other side of A, and directly opposite to g, there is an upright portion, e', which has a circular opening made in it to receive a circular disk, E, the edge of the latter bearing against a shoulder, j, at the edge of the opening. (See Fig. 2.) To the back of the disk E there is secured thc case 7c of a spiritbulb, F, a slot, l, being made in the disk E to expose the bulb. (Sec Figs. l and 2.) rlhc thumb-screw h passes into a nut, m, at the back of the case 7c ot' the bulb F, and by screwing up h the disk E may be firmly secured in position, and by unscrewing li the disk may be turned to any desired point.. The exterior of the disk E is graduated, r

siown at a, to admit ot thel spirit bulb F be.

ing set to any desired angle relatively with the top and bottom of A. By means of' this adjustable bulb F any required bevel may be obtained. In Fig. l the bulb F is represented adjusted, in red, to obtain an inclination ot' thirty degrees. There is a wooden side, B, at each side ot' the portions g fi, and the latter have tlanges for the adjoining ends of the sides B to bear against.

In one end, c, ofthe metal part A of' the dcvice there is an opening, 0, and in the opposite end there is made an opening, p, of elliptical form, in which a tube, q, is fitted, having aI glass, r, at its inner end, over which crossf wires s are fitted or placed to form a sight. The inner end of the tube q -has a square 'raine, t, attached to it, in which the glass r is fitted, and into the upper end of this frame tascrcw, G, works, said screw passing through the top a of' the metal pa-rt A of the body or stock of the implement. By turning the screw Gr the tube q may be raised and lowered, and the wire sight s consequently adjusted as dcsired, the elliptical form of the opening jp, in which the tube q is fitted, admitting of a vertical movement ot said tube. This cross wire sight is useful for leveling und grading pur# Having thus described my invention7 what poses, and the adjusting of the sight s admits i I claim as new, and desire to secure by Letters of the level being always kept correct. i Patent, is-

By constructing the body or stock of the l Constructing the frame of theinstrument of implement its shown it is prevented from metal, With 2t thin siding of Wood to protect warping, and at tlie saine time may be eontheinterior arrangement from dust and inj ury. strueted light and be Very strong and durtiE EL s SHEPARDSON.

ble. By havilg the thumb-screw h fitted within the cone-ave g it is kept entirely out (f Titnessesz the Way and prevented from coming in con l F. R. PRATT,

tact with adjoining 0r surrounding objects. NV. H. MAYNARD. 

